Secret Whispers — V.C. Andrews

THERE'S NO PLACE LIKE HOME...

On the eve of her graduation from an exclusive private school, shy wallflower Semantha Heavenstone is caught in a whirl of scandal and betrayal. Now, she's returned to the grand Kentucky mansion where painful memories of her mother and her older sister, Cassie, are as potent as newly mown bluegrass. It seems no matter where she goes, Semantha is haunted by a voice from the grave -- spiteful, domineering Cassie, whose taunts and manipulations seem as real as when she was alive.

...AND NO END TO THE NIGHTMARE

Soon her father will remarry, new memories -- and a new stepmother -- will replace the past...and Semantha herself has a chance at a bright future with a career inside the Heavenstone empire and handsome Ethan Hunter by her side. But someone will see to it that Semantha never forgets the tragedies of yesterday. Will Cassie's ghostly hold on Semantha destroy her hope and drive her to madness?